Process for the production of alpha lubricant and the lubricant resulting from the employment of the process



Patented Apr. 16, 1929.

UNITED STATES 1,709,3 11 PATENT OFFICE.

CHARLES B. DE HART, or ciarcaeo, ILL'INOIS.

PROCESS FOR THE PRODUCTION OF A LUBRICANT AND THE LUBRICANT-RESULTING FROM THE EMPLOYMENT OF THE PROCESS. I

No Drawing My present invent-ion relates to a process for the'production of a lubricant and the composition of matter or lubricant resulting from the employment of the process.

My object is the production of a lubricant which will have improved lubricating qualities by adhering more tenaciously to the surfaces to be lubricated and, therefore which will be displaced less easily in the operation of the parts.

I am aware that it has often been attempted heretofore, but without success, to produce such a lubricant by making a mechanical mixture of a powdered insoluble 1 substance-such as graphiteand a lubricating oil. The difiiculty, hitherto unsolved, has been to find a suitable powdered lubricating material together with a suitable homologizing agent, and methods of heating and cooling same in combination with lubricatingoil which would result in holding'the powdered material in sufficiently permanent uspension and uniform distribution throughout the oil.

I. have found that jefierisite, a mineral produced in merchantable quantities in Colorado, has lubricatin and heat and acid resisting qualities whlch make it one of the most desirable of all insoluble substances for combination with oil as a lubricant; and the special problem solved by m invention was to combine desirable quantities of jeiferisite with oil b a process which would insure its uniform ispersion, together with its practically permanent suspension therein so far as the action of gravity is concerned.

I attain most economically the uniform dispersion of jetferisite in lubricating oil in a non-separating composition in the following manner: A portion of jefferisite and preferably an equal portion of aluminum stearate are mixed together in their powdered forms and later thoroughly mixed with lubricating oil while all are cold. Then the 15 oily mixture is slowly heated nearly to its flash point. This is necessary to bring" the aluminum stearate to its melting point, where it nearly all goes'into solution. It is possible, however, to mix the ingredients in an order or to heat them in any order pro- .vi ed the high temperature of the mixture be finally attained. The oil should be selected with the desired viscosity and body in view of the specific useto be made of it, and

Application filed January 28, 1927. Serial No. 164,379.

should have a flash point between 220 Fahrenheit and 650 Fahrenheit. Care should be taken not to heat it so hot as to cause it to flash. The preferable quantity of aluminum stearate is, for inorganic oils, about 1 oz. per gallon of oil. The preferable quantity of jefferisite is also about 1 oz. per gallon of oil. The addition to lubricating oil of jefferisite of a large range of fineness is desirable and hitherto has been impossible, but

we prefer to employ the water-ground jefferisite which will pass a 120 mesh. Coarser particles will, however, disperse with oil by this process, and any excess of jefierisite above the quantity dispersable with oil by this process will precipitate during the slow 7 coolinoof the composition and may be removed from the container'without interfering with the success of the process. The more fluid the oil is originally, the more aluminum stearate it will preferably require 7 to effect the dispersion, with a corresponding reduction in the amount of jefierisite.

As examples of various oils which may be employed in carrying out my processes are the following:

Pennsylvania Triple F Bright Stock with a gravity Baum 27, with a flash point of 550 F., with a fire point of 650 F., with a pour point of 40 F., with Saybolt viscosity of 1&0 at 212 F.- The heat treatment on this oil requires that the temperature be raised to 400 F.

Western Bright Stock with a Bau'm grav ity of 22, a flash point of 540 F., with a fire or end point of 600 F,,' with a our point of 40 F. and Sayboltviscosity 0 155 at 212 F. The treating temperature of this oil is also 400. F. i

Pennsylvania 650 steam refined stock with a Baum gravity of 255, a flash point of 595 F. and a fire and end point of 670 F.,

a pour point of 30 F. and Saybolt viscosity of 190 at 212. ,The treating temperature of this oil is also 400 F.

- No. 14 Western Black Stock'with a ravity of 22 Baum, a flash point of 550 and a fire point of 610 F., with a pour of 45 F. and a Saybolt viscosity of 200 at 212 F. The treatment temperature of this oil is 400 F.

The abovementioned stocks ma be reduced to the viscosity desired by t e trade using them, by the addition of neutral oils,

with a viscosity ranging from 100 Saybolt viscosity at 100 F. to 750 Saybolt viscosity at 100 F. by compounding at a temperature of 220 F. It has been found by experiments that crank case oils for automobile engines made by the above described process result in much more highly polished surfaces especially on such parts as the piston and cylinder Walls, valve faces and stems, because the gasifying of the oil due to the intense heat generated in the firing chamber will leave behind on these surfaces a residue of jeiferisite which gives a, substantial improvement in their lubrication since jelferisite is not affected by the heat.

Having described my invention what I claim as new and desire to secure by Letters Patent is:

1. A process for producing a lubricant by mixing ingredients consisting of jefferisite, aluminum stearate and a hydrocarbon lubricating oil and then-heating the mixture to near but belowthe flash point of the oil, and then permitting said heated composition to slowly cool.

2. A lubricant produced by mixing the jefferisite, aluminum stearate and a hydrocarbon lubricating oil, and then heating the mixture to near but below the flash point of the oill and then permitting said composition to coo CHARLES B. DE HART. 

